Pretty little leaves tinged with reddish purple distinguish this baby leaf mustard. Osaka Purple mustard seeds young leaves are sweet, but grow to become pungent at the full 80 days. Another great choice for salad mixes. Plant Osaka Purple mustard seeds in containers and harvest as microgreens, baby greens, or full sized mustard leaves for salad mixes. Osaka Purple is cold hardy, and can be harvested late in fall and early in the spring. Give it some frost protection with a cloche or heavyweight row cover, and it will grow all winter here in the Pacific Northwest.